Christopher h



(No M66161.

C. H. OLSON.

TOOL DRIVER. No. 402,538. Patented Apr. 30, 1889.

v v INVENTOR I I L6 71. orww, I n5 ggg miz UNITED STATES PATENT OFFICE.

CHRISTOPHER H. OLSON, OF DECATUR, ILLINOIS, ASSIGNOR TO THE DE- CATUR COFFIN COMPANY, OF SAME PLACE.

TOOL-DRIVER.-

SPEGIFIGATION forming part of Letters Patent No. 402,538, dated April 30, 1889.

Application filed June 8, 1888. Serial No. 276,508. (No model.)

T0 00% whom it may concern.-

Be it known that I, CHRISTOPHER H. OLsoN, of the city of Decatur, county of Macon, and State of Illinois, have invented certain new and useful Improvements in Tool-Drivers, of which the following is a specification.

My invention relates to that class of tooldrivers in which a handle is reciprocatingly ing a part of this specification, Figure 1 represents my device complete.

Fig. 2 shows my device with a modified form of handle represented in longitudinal section. Fig. 3 is a view of a part of Fig. 1, showing the coupling-sleeve in section. Fig. 4 is a crosssection of the drive-shaft on line as in Fig. 1. .Fig. 5 is a cross-section of the tool on line y in Fig. 3. v

The handle is indicated by reference-letter a; the metallic shaft-guide by d or a.

b is a spiral shaft, preferably-formed of a bar square in cross-section, suitably twisted. The sleeve 0 is secured to shaft 19 by pin f, and it has a square recess in its operative end, as shown in Fig. 5. The tool d has the portion (1' square in cross-section, and adapted to the recess of the sleeve. It also has the round bearing d and the diminished round portion 0. (See Fig. 3.)

e is a securing-screw, the inner end of which fits in the sleeve against the diminished round portion of the tool and secures the tool in the sleeve, while permitting a limited amount of independent longitudinal motion. The drive-shaft has a collar that bears against the inner surface of the handle and guides the shaft.

In the second figure of the drawings a bearing for the guide-collar is formed of a light metallic bar, a, fixed at each end in drive collar h and inserted in the handle. The guide-collar is loosely mounted on the end of the driveshaft,-and when used with bearing a has peripheral grooves adapted to the bar. This form is recommended on account of cheapness, as a wooden handle held by thimble h of drive-collar it may be substituted for a more expensive metallic handle.

In Fig. 1 the handle incases a metallic cylinder that acts as a guide bearing for the guide-collar, which may be minus the grooves and rigid on its shaft.

In operation the handle is longitudinally reciprocated and the shaft rotated alternately in opposite directions. At each push-stroke the square portion of the tool engages the square recess of the sleeve, and the tool is rotated with the shaft' At each pull-stroke the square portion of the tool is drawn out of the square recess, as shown in Fig. 3, and the shaft rotates in a reverse directionto the left-without affecting the tool.

As shown, the tool is a screw-driver; but it is obvious that various tools having rotative operation may be adapted to the sleeve and used therein interchangeably, the screw 6 affording ready means for connecting and disconnecting the tools with the sleeve.

A modification of my device would consist in reversing the preferred arrangement and securing the tool rigidly to the sleeve. This idea is suggested in Fig. 2, where the screw is shown in position to co-operate with the shaft, and the pin is shown in position to penetrate the tool. The changes necessary to complete the modification will readily ocour to makers and users of such tools, as the relative positions of parts are affected, and not their construction.

I claim- 1. A tool-driver comprising the spiral shaft,

the handle adapted to rotate the shaft by longitudinal reciprocation, the coupling-sleeve secured to the shaft and having the square recess, the securing-screw in the sleeve, and the tool having the square portion, the round bearing, and the diminished portion adapted to the securing-screw, as set forth.

2. A tool-driver comprising the spiral shaft having guide-collar g, the handle adapted to rotate the shaft by longitudinal reciprocation and having the bearing a, for the guide-collar, the coupling-sleeve secured to the shaft and having the square recess, the securingscrew in the sleeve, and the tool having the square portion, the round bearing, and the diminished portion adapted to the securingscrew, as set forth.

. CHRISTOPHER H. OLSON.

Attest:

J. O. HOSTETLER, R. E. MODANIEL.

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